Sewing-machine



(NoModel.)

l C. A. WOOD.

. Y Y SBWNG MACHINE. No. 283,449. Patented Aug. 21, 1883.

TEE

lilimnln ilNrrnn STATES 'PATENT @Frisia CHARLES A. lOO'D, OFPHILADELPHIA, PENNSYLVANIA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 283,449, dated August21, 1883.

Application tiled December S, 1882, (No model.)

To all whom, it may concern:

' Be it known that I, CHARLES A.. Woon, a

citizen of theUnited States, residing at Philaures of reference markedthereon, which form a part of this speciiication.

The object of my invention is to provide asuperior construction andopera-tion of the feed and shuttle lever mechanism, also to provide f asimple and effective method of lengthening and shortening the stitch.

Illhe nat-ure of my invention will appear fully from the followingdescription:

Figure l is a vieu-'of the under side of the bed-plate anditsattachments. Fig. 2is aside elevation ofthe same inverted, partly inbroken section. Fig. 8 is a detail inverted view oft-he shuttle-lever,crank-plate, hub, and lift-cams.

Fig. liis a detail invertedview of the feed-bar. l

Fig. 5 is an inverted view, in vertical section, showing the manner oi'pivotin g the feed -lever,

also the form and method of fastenin g the pivot.V y

Like letters refer to like parts.

A represents the bed-plate of the machine. The upright shaft, passingthrough said plate, terminates in a lift-canna, and a crank-plate, Zz.The .hub of the crank-plate is provided with a cam, c, of the shapeshown.

The shuttle-lever Bis cast in one piece, and is composed ofthe lon g armd, carrying the shuttle-holder s, and the short arm e. oscillatesaroundastud affixed to the bed-plate by means of the cylindricalportionf of the shuttle-lever. (See Figs. landQ.) The driven end e ofsaid lever is truncated or cut olif, and is made hollow. 'On the sidenext to the crankplate is made a long slot, g, having ears h 71, asshown, on each side, and through these ears pass screws. The object ofthis construction is to make the end c close. equally around the slidingpiston z', in order to take up lost wear when necessary. The piston tslides in the driven end of the shuttle-lever, and is connect- Thewhole' g, and carries the piston as the crank-plate revolves.A (SeeFigs. 2 and 3.)

The feed-lever C is maderin one piece, one end connecting with thefeed-bar, the other with the lift-cam of the upright shaft. From thelower side of the bed-plate A depends a bracket, k, hollowcd out toreceive arock-shaft.l Z. Into this rock-sh aft is inserted ascrew-pivot, m, having above the feed-lever a concave bearing, wftomatch with the rock-shaft. Between the feed-lever and the screw-head ofthe pivot is a washer or collar, fw. (See Figs. 2 and 5.) By thisconstruction the feed-lever is not only fastened, but may also have arising, falling, and lateral motion to properly actuate the feed-bar.The feed-lever, at its outer end,ter minates in a right-angled arm, andto this arm is joined a projecting rider, n, which slides upon the lowersurface ofthe periphery of the lift-cam as said cam raises andlowers thefeedlever. .The forward or lateral motion of the feed-lever is obtainedby means of the supplementary lever D, operated by thc cam c onthe hubof the crank-plate. Said supplementary lever has the head o at one Vend,for engaging with the cam e. The other end is hinged to a stud in thebed-plate, as shown, Fig. 1. The motion of the supplementary lever iscommunicatedto the feed-lever bythelaterally-swinging strap E,hingedupon the feed-lever,at one end, and engaging with the sliding bar F, atthe other, by means of a stud, p. This stud ,proj ects from the swingingstrap, near thel end p thereof, and from the other side of said end eX-tends a pin, o', which plays in a slot, r, cut in the curved end of thebar F. (See Fig. l.) The sliding bar F, with curved arm, is for thepurpose of regulating the length of the stitch. It is constructed at thebent end to engage with the swinging strap E, as above described. Thelong straight end is fastened, through a long slot, in the bed-plate bya burred nut, a', and screw t, the latter extending through said plate.By moving the bar F laterally and fastening it in the desired placebythe burred nut the stitch may be regulated, as the position of saidbar will affect the play of the feed- IOO lever and the swingingstraphthe latter being e i A 283,449

lever through the supplementary lever D and l the swinging strap E. Inother words, the sliding bar F :moves the engaging point p of theswinging strap E nearer to or farther from the fulcrum of the lever D,as said bar carries the strap with it when moved. The feed-lever isjoined to the feed-bar H by the screw-headed hanger 11,. The spring 7cassists to give the feed-lever a downward lateral motion. Itsconstruction need not be further described here..

The operation of my device need not be described,as it will be easilyunderstood by those skilled in the art from the drawings and the abovedescription.

Having thus fully described my invention, what I claim, and `desire tosecure by Letters Patent, is-

1. The combination of the supplementary lever operated by the cam on thehub of thc crank-plate, with the swinging strap and feedlever, thelatter operated bythe lift-cam, substantially as set forth.

2. The combination of the supplementary pivoted to the feed-lever, nearits end, as sh own, with the feed-lever and the feed-bar, substantiallyas set forth.

8. The combination of the adjustable sliding bar with the supplementarylever, swinging strap, and feed-lever, substantially as set forth.

4. The combination of the cani on the hub of the crank-plate with thesupplembntary lc; ver, sliding bar, swinging` strap, and feed-lever,whereby a lateral motion is given to the latter, as set forth. y

5. rlhe combination of the bracket and rockshaft with the concavebearing, feed -lever,

washer, and screw-pivot, substantially as set forth.

6. The combination ofthe sliding piston with the driven end of theshuttle-lever, said driven end being' provided with a cylindrical boxdirectly under the crank-plate for the play of the piston, the box beingslotted to receive the crank-pin, and provided with ears to take upwear, substantially as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

'CHARLES A. Woon.

y Vitiiesses:

HORACE K. FLINT, In.; K. Hirrnn.

